Skiving-machine.



v use the same. i i. .A l

This inventlonrelates to improvements 1n f' www STATES LORENZO P. HxwxiNs.

IieirrijNT OFFICE.

OF PORTLAND, MAINE.

To @ZZ whom/llt concern:y

Be it known that I, LORENZO P. HAwxINs, a citizen ofthe United States, residing at Fortland, in the county of Cumberlandand State of Maine, have invented certain new and useful Improvements in Skivin l-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled-in the artto which it appertains to make and welt skiving machines, and more particularly to machines arranged .to skive or bevel a Welt after the welt has been. attached toa lasted upper and insole, and it relates more particularly to means for holding the welt While being skivedand for feeding the welt..

To this end it consists of a work-su port having its under ,outer edge bevele and adapted to travel in the groove between the upper and the welt, a vknife suitably positioned relative to said work-supp ort a presserfootpositioned directly in front of said knife and close to the cutting edge thereof, means for holding said presser-foot yieldingly upon the welt, and means for feeding the welt spaced apart from the support, 'the feed-roll being positioned relative to the other parts so that it travels upon the solid portionof the j welt at or be ond the seam wherethe welt is the invention should be limited to the preciseforms hereinshown, except as specifically stated in4 the claims.

In said drawings, Figure 1 is a front elevation of a skiving-machine7 showing my im-l provernents4 attached thereto, parts being broken away. Fi .2 is a side elevation of the same, parts being roken away; and Fig. 3 is a' detail view, partly insection, showing 'the position of the work-support, knife, presserfoot, and feed-roll relative to the work.

Same letters of refe-rence refer to like parts. In said drawings the frame of the machine is represented by the base A and the upright I specification o f Letters Patent.

Application filed MMGh `'7, 1904. Serial No. 196,811. v

columns-B and C at theA front VAand'baclgir'efv spectively. Pivotally secured to column C is an arm- D, whichextends forwardly-through an opening E in column B. A spring F, in-

ter-posed between said "arm.,and the top 4of column B, holds the arm down with yielding increased by means of a set-screw G in the top of said column engagingsaid spring or a plate H on the top thereof. Mounted insaid columns is a driving-shaft I, on one end 4of vwhich is a crank J, or a pulley may be substituted for the crank if it is desired to drive the machine by ower. Mounted on shaft I is a gear K,whic meshes with a gear L on a counliatentea rvr-arh 2o, 190e.

tension. Ihe efficiency of the spring can `be ter-shaft M, mounted in the arm l).v Column A B is provided with a bracket N, which supports a combined work-support and workgnide' O, which is mounte on antifriction ball-bearings P. and adapted to lrotate in a horizontal plane, said4 work supporty beingl adapted to enter and travel in the crease be.

tween the welt andl upper of the shoe. In a socket in said bracket is a knife-carrier Q, having a vertical supporting portion Q and ar horizontal knife-carrying portion- Q2, said knife-carrier being adapted to rotate in a horizontal plane in the socket in which it is 'y mounted. It is given a vertical adjustment by means of threaded screw R, extending upwardly through the bottom of the bracket into -engagement with the lower end of the carrier. The carrier is adapted to be held against horizontal rotation by means of a setscrew S. lA presser-foot T is secured near the end of said arm directly over the work-support. Said presser-foot has its .lower extremity bent over, as seen at U. Mounted in a bracket V on the arm is a screw-threaded adjusting-nut W, between which and the to of the presser-foot is inserted a coil-spring i which tends constantly to force the presserfoot downwardly with a yielding tension up on the work. Passing. through the adjusting-nut is a rod Y, which also passes through with screw-threaded engagement the bent-over IDO top Z of the presser-foot, the lower extremity of said rod having bearing on the top of theV arm. By this means it will be rea ily apparent that the distance between the presserfoot and the work can be positively regulated by means of said rod .and the tension of the presser-foot upon the work can be regulated by said adjusting-nut. The presser-foot may be held in position u on the arm by means of strap 1. On the en of shaft M is a feed-roll IIO' 2, which is positioned directly beneath the presser-foot, butvis spaced apart some distance from work-support, as clearly shown in Figs. 2 and 3. On the under side of the knife-carrier is a skiving-knjfe 3, projecting upwardly and forwardly over said work-support close behind the part U of the presserfoot. Said knife may be horizontally adjusted by means of screws 4, working in slots in the knife-support, and may be angularly adjusted by means of screw 5, passing through the work-support and impinging the top of the knife-handle, as clearly seen in Fig. .3. The arm, together with the presser-foot and feed-roll, can be raised to receive the work by lmeans of cam-lever 6, secured to the frame and Working against the arm. Said cam-lever may be o erat'ed by hand or by a foottreadle (not shown) attached to a link connecting said foot-treadle with the arm of said cam-lever.

The operation of my improved skiving-machine is clearly shown in Fig. 3, in which 9 represents the inner sole, 10 the channel, 8

the upper, and 7 the welt, of a shoe. The work-support enters the space between the upper and the'welt, the welt resting on worksupport O, the seam formed by sewing together the welt, inner sole, and upper lying beyond the edge of the work-support. The

presser-foot T rests upon the welt directly over the work-support and in close proximity to the front or cutting edge of the knife. The feed-roll, however, rests upon the seam or hard part of the work, thereby always having a firm unyielding bearing. This is one of the most essential features of my invention, for I have found by experiment that when the feed-roll works directl upon the free or ioating edge of the welt t 1e feed is uneven, resulting in uneven skiving of the Welt and great injury to the shoe.

Having thus described my invention and its use, I claim- In a welt-skiving machine,a work-support, a knife-carrier comprising a vertical rotary supporting-post and a horizontal knife-carrying arm, means for supporting said knifecarrier, a knife adjustably secured to said arm and means for feeding the work over said work-sup ort.

In testimony whereof I have hereunto affixed my name, in the presence of two subscribing witnesses, this 5th day of March, 1904.

LORENZO P. HAWKINS.

In presence of- ELGIN C. VERRILL, MARION RICHARDS. 

